Timeline view - Order of grouping other than A-Z

[Coups]

When using a timeline view for tasks, we know if you group by Project, it's a nice way of being able to view all Project tasks in a neat and concise way, side by side.

Is there a way to order the Projects (vertically) by the earliest task?  At the moment the only options are alphabetically A-Z or Z-A.  This would help with scheduling

As a temporary measure I'm adding a number to the start of the project name to force the order I want but unsure if there's any other work around...

Screen grab for context (sorry about the blanking out of info)

[TheTimeSavingCo]

Hmm what if you grouped it by a formula field that was [Earliest task date] - [Project name]?